Arthmetic

Question 1

Evenly spaced sets

A. Sum
B. no of terms
C. Ave of odd # consec
D. Ave of even # consec

Answer 1

A. Sum: average * no of terms
Average: first and last terms
B. No of terms:

last - first / increment + 1

Ex. Even integers between 12 & 24
24-12 / 2 + 1

C. Ave of odd # - always integer, mean = median

D. Ave of even # - never integer
Mean and median = ave of first and last terms

Question 2

Perfect square solutions

(X-4) ^ 2 = 0

Answer 2

1 root: x = 4

Question 3

Finding factors of a number

Answer 3

1. Write prime fctors
2. Add 1 to all powers / exponents
3. Multiply

Question 4

Arithmetic sequence

Answer 4

A1 + (n-1)d

Question 5

Arithmetic sequence

Answer 5

A1 + (n-1)d

Question 6

1. 01^2
2. 02^2
3. 03^2
4. 04^2

Answer 6

1. 0201
2. 0404
3. 0609
4. 0816